Boston-based Regan Communications Group has marked five years of growth in its New York office, its second largest outpost, by producing this spoof on the intro to NBC's "30 Rock" featuring Regan's Big Apple staffers.

The clip, "75 Rock," marks the firm's relocation to a larger space this year at 75 Rockefeller Plaza. Below, top, is Regan's work followed by the original "30 Rock" intro: